Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 2639

GRB 040810: Optical observations of a limited region
2004-08-10T21:58:37Z (20 years ago)
Paul Price at IfA,UH <>
P.A. Price (IfA, University of Hawaii), M. Hauser (Landessternwarte
Heidelberg-K\"onigstuhl), G. P\uhlhofer (MPIK) and S.J. Wagner
(Landessternwarte Heidelberg-K\"onigstuhl) report:

We observed a small number (4) of 18 arcmin square fields within the
error box of GRB 040810 (HETE #3489/4) using the 40-inch telescope at
Siding Spring Observatory in R-band at mean epoch 2004 Aug 10.761,
before other time-sensitive observations became of high priority.  These
fields are centered at J2000 coordinates: 23:52:00 -35:04:25 ; 23:52:00
-34:49:22 ; 23:53:30 -35:11:55 ; 23:54:31 -34:56:54.

We do not identify any optical afterglow upon manual comparison with the
Digitised Sky Survey 2 F plates.  We estimate that the limiting
magnitude of these observations are R ~ 18 mag from rough calibration
with the USNO-A2.0 catalogue.

This message may be cited.
Looking for U.S. government information and services? Visit